Variational close-coupling calculation for positron-hydrogen scattering at low energies
- 1 October 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 46 (7) , 3918-3923
- https://doi.org/10.1103/physreva.46.3918
Abstract
The S-wave (L=0) and P-wave (L=1) phase shifts and the S-wave and P-wave elastic and positronium-formation cross sections for positron scattering from hydrogen at energies below the first excitation threshold are calculated in the close-coupling approximation, using the algebraic variational method. Four target-state coupling schemes (H 1s–Ps 1s, H 1s– H 2s–Ps 1s, H 1s–H 2s–H 2p–Ps 1s, and H 1s–H 2s–H 2p¯–Ps 1s) have been considered for the calculation. It is found that the H 2p¯ target channel significantly affects the S-wave positronium-formation cross sections.Keywords
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